/ 
Tk804.025_beta1
/ pod/pTk/TimerHndlr.pod
Security Advisories (6)
CVE-2006-4484 (2008-10-01)

Buffer overflow in the LWZReadByte_ function in the GD extension in allows remote attackers to have an unknown impact via a GIF file with input_code_size greater than MAX_LWZ_BITS, which triggers an overflow when initializing the table array.

CVE-2007-4769 (2008-01-09)

The regular expression parser in TCL before 8.4.17, as used in PostgreSQL 8.2 before 8.2.6, 8.1 before 8.1.11, 8.0 before 8.0.15, and 7.4 before 7.4.19, allows remote authenticated users to cause a denial of service (backend crash) via an out-of-bounds backref number.

CVE-2003-0107 (2003-03-07)

Buffer overflow in the gzprintf function in zlib 1.1.4, when zlib is compiled without vsnprintf or when long inputs are truncated using vsnprintf, allows attackers to cause a denial of service or possibly execute arbitrary code.

CVE-2007-4772 (2008-01-09)

The regular expression parser in TCL before 8.4.17, as used in PostgreSQL 8.2 before 8.2.6, 8.1 before 8.1.11, 8.0 before 8.0.15, and 7.4 before 7.4.19, allows context-dependent attackers to cause a denial of service (infinite loop) via a crafted regular expression.

CVE-2007-6067 (2008-01-09)

Algorithmic complexity vulnerability in the regular expression parser in TCL before 8.4.17, as used in PostgreSQL 8.2 before 8.2.6, 8.1 before 8.1.11, 8.0 before 8.0.15, and 7.4 before 7.4.19, allows remote authenticated users to cause a denial of service (memory consumption) via a crafted "complex" regular expression with doubly-nested states.

CVE-2017-12652 (2019-07-10)

libpng before 1.6.32 does not properly check the length of chunks against the user limit.

NAME

Tk_CreateTimerHandler, Tk_DeleteTimerHandler - call a procedure at a given time

SYNOPSIS

#include <tk.h>

Tk_TimerToken Tk_CreateTimerHandler(milliseconds, proc, clientData)

Tk_DeleteTimerHandler(token)

ARGUMENTS

int milliseconds (in)

How many milliseconds to wait before invoking proc.

Tk_TimerProc *proc (in)

Procedure to invoke after milliseconds have elapsed.

ClientData clientData (in)

Arbitrary one-word value to pass to proc.

Tk_TimerToken token (in)

Token for previously-created timer handler (the return value from some previous call to Tk_CreateTimerHandler).

DESCRIPTION

Tk_CreateTimerHandler arranges for proc to be invoked at a time milliseconds milliseconds in the future. The callback to proc will be made by Tk_DoOneEvent, so Tk_CreateTimerHandler is only useful in programs that dispatch events through Tk_DoOneEvent or through other Tk procedures that call Tk_DoOneEvent, such as Tk_MainLoop. The call to proc may not be made at the exact time given by milliseconds: it will be made at the next opportunity after that time. For example, if Tk_DoOneEvent isn't called until long after the time has elapsed, or if there are other pending events to process before the call to proc, then the call to proc will be delayed.

Proc should have arguments and return value that match the type Tk_TimerProc:

typedef void Tk_TimerProc(ClientData clientData);

The clientData parameter to proc is a copy of the clientData argument given to Tcl_CreateTimerHandler when the callback was created. Typically, clientData points to a data structure containing application-specific information about what to do in proc.

Tk_DeleteTimerHandler may be called to delete a previously-created timer handler. It deletes the handler indicated by token so that no call to proc will be made; if that handler no longer exists (e.g. because the time period has already elapsed and proc has been invoked) then Tk_DeleteTimerHandler does nothing.

KEYWORDS

callback, clock, handler, timer